Northwest Metal 6 x 24 Inch Stainless Steel Pipe 24 Gauge. Six inch diameter. Twenty-four inches long. Install only in masonry chimney. SKU:  089800 Model #:  312406 UPC:  029133069692 Price:  $49.99 (online product & prices may not reflect in-store inventory or prices)   This product can only be purchased at one of our store locations, and is not available for online fulfillment at this time.